The spiral book Classic 142 holds within it a complete SPIRAL REFILL BOOK 501 of sheet-protectors. This of course means that single sheet-protectors cannot be interchanged with this type of presentation album: if any of the sheet-protectors become damaged the whole refill book must be replaced. Complete presentations can be archived in a refill book and kept ready at hand to be interchanged as necessary. Because of the slender spiral mechanism, these albums lie particularly flat on a table.

The Classic 142 can be ordered with 20, 30 or 40 sheet-protector refill books – every Classic 142, it should be noted, can be used in conjunction with every refill book of the right size.